Description Hide Description- Show Description+ KR Strikeforce Workout Tool with 5/8" Blade The Strikeforce Workout Tool is what every bowling needs to shape their thumb hole for that perfect fit. 5/8 in. blade Quality anodized aluminum handle Great for forming fine tuning your thumb and finger holes SKU: KRA62058 Product ID: 13341 Brand: KR Strikeforce Category: Bowling Accessories